mitt's great, great grandfather, miles romney, was living near liverpool, england, and he heard mormon missionaries come from the u.s. and preach their message. and mitt's great, great grandfather believed this message was true and converted and then took his family top navu, illinois, which was then the center of mormom onnism in the united states. >> yet, since its founding in the early 1920s, mormons have often been persecuted because of their 19th country practice of plural marriage or polygamy and also their belief that there's a third testament, the book of mormon which maintains that jesus visited the new world. >> as soon as they began to get established, you began to have persecution of a kind that is >> very american. >> the mormons often found themselves forced to flee from new york state where their young founder, joseph smith, says he uncovered the golden tablets that became the book of mormon, to ohio and missouri and then illinois.